查询词典 filtering

Adaptive filter can adjust its coefficients automatically to minimize the mean-square error between its output and that of an unknown input, unnecessary to know the autocorrelation functions of signal and noise in advance, hence it can realize linearly optimum filtering.

自适应滤波器可以不必事先给定信号及噪声的自相关函数，它可以利用前一时刻已获得的滤波器参数自动地调节现时刻的滤波器参数使得滤波器输出和未知的输入之间的均方误差最小化，从而它可以实现最优滤波。

The emphasis in this composition is windshear signal processing technology. Some processing methods are introduced in detail, they are suppressing clutter,extracting windshear parameters,computing hazard factor and etc..The signal processing simulation is accomplished on computer, it includes simulating microburst echo signal,simulating ground clutter echo signal,filtering clutter,estimating wind speed and calculating hazard factor.

本文重点研讨了风切变信号处理技术，对杂波抑制技术、风切变特征参数提取技术及危险因子计算方法等内容进行了深入的研究，并进行了计算机模拟，包括微下击暴流回波信号模拟、地杂波回波信号模拟、杂波抑制、风速提取和危险因子计算。

Results show that using bin to bin automatic gain control,clutter filtering,and suitable antenna tilt management,the " wet " microburst windshear can be accurately detected 80s(approximately 6km) in front of the aircraft,meeting the certification requirements proposed by FAA.

结果表明：通过单元－单元自动增益控制、杂波滤波和天线仰角控制，可提前80s（6km）探测到&湿&微下击暴流风切变，符合FAA提出的适航要求

Although mid-value filtering is often used to eliminate seismic information noise, it does not have good effect on noise elimination because of its high requirements for noise-eliminated information.

中值滤波是地震资料去噪处理中的常用工具，由于其对去噪资料有较严格的要求，使去噪效果不甚理想。

The linear darkness transform method is used to increase the contrastiveness of pictures; the improved mid-value filtering algorithm and local average method are adopted to protect the edge as much as possible on the basis of noise elimination.

采用线性灰度变换等方法对图像进行增强，使图像的对比度扩展。采用改进型中值滤波法和多图像平均法，在去除了噪声的基础上尽可能的保护了边缘。

This paper proposes an integrated processing method of mid-value digitalfittering and recursive digital filtering to solve the disturbance problem duringtelemeasurement and data acquisition in electric power system. The method is inferredand proved.

针对电力系统遥测数据在采集过程中的干扰问题，提出了中位值数字滤波与递归式数字滤波综合处理的软件方法，并对这种方法进行了推理与论证。

For this reason, the author used mid-value filtering method for diminishing the pattern noise, the binary-image transformation method by selecting variable threshold value, and the extraction method of the central line for full-field binary-image.

为此作者使用中值滤波法对图像噪声进行抑制，利用可变阈值对图像进行二值化，实现了二值图像条纹灰度中心线的自动检出。

Firstly,the mid-value filtering,the edge strengthen and the image binary conversion are used to pre-process the image,and then the values of casting surface roughness are got through characteristic acquisition.

该方法利用CCD摄像头摄取铸造表面图像并存入计算机，首先用中值滤波、图像边缘增强和图像二值化等对图像进行预处理，然后通过特征提取获得铸造表面粗糙度数值。

Base -on optimal stack filtering theory, the multi-stage adaptive WOS filter is pro posed by expressing the PBF of WOS filter in term of linear separate function.

根据层叠滤波器理论，所有WOS滤波器正布尔函数都是线性可分离的。

This paper introduced a method for workpieces error on-line test based on spatial filtering.

本文提出了一种利用空间滤波实现在线检测工件误差等级的方法。

Further more, the simplified analysis method on stressed-skin effect of corrugated steel sheet is also discussed in detail.

此外还比较详细地探讨了蒙皮效应的简化分析方法。

If I had known her telephone number,I would have called her.

要是我知道她的电话号码，我就打电话给她了。